*{
    padding: 0;
    margin: 0;
}
.tab{
    width: 590px;
    height: 340px;
    margin: 20px;
    border: 1px soild #e4e4e4;
}
.tab_nav{
    width: 100%;
    height: 60px;
    line-height: 60px;
    display: flex;
    justify-content: space-between;
}
.tab_nav h3{
    font-size: 24px;
    font-weight: normal;
    margin-left: 20px;
}
.tab_nav ul{
    list-style: none;
    display: flex;
    justify-content: flex-end;
}
.tab_nav ul li{
    margin: 0 20px;
    font-size: 14px;
}
.tab_nav ul li a{
    text-decoration: none;
    border-bottom: 2px solid transparent;
    color: #000000;
}
.tab_nav ul li a.active{
    border-color: rgb(245, 182, 64);
    color: rgb(245, 182, 64);
}
.tab_content{
    padding: 0 16px;
}
.tab_content .item{
    display: none;
}
.tab_content .item.active{
    display: block;
}
